Current “community” builds were “dev” builds previously, and all built by murena, not the community. Thus your trust could be equated between official builds and communiy. (There’s also a new aspect to them as documented here “Community builds dropped for these devices”)
What you might have in mind is unofficial builds that really are built by regular forum participants? in those you’d need to trust the publishing user.
The security of the Official-Community builds, despite the fact of encryption with keys signs or certifications (SHA2*), only guarantee the protection somehow of directories with superuser permission, but do not “safe” devices from basic attacks. There is not secure devices though.